Hi, I had my first appointment with a rheumatologist last Monday and have been told I have undifferentiated connective tissue disease. She has carried out lots of tests which I am waiting for the results of but in the meantime has prescribed nifedipine for my raynauds. I am on 20mg twice a dsy and have only managed 2 days on it as it is making me feel awful. I have had a terrible headache that made me sick and feel very lightheaded and extremely irritable. I have not taken it tonight. Are these normal side effects?